Estimate the cost of operating on Zero Network.
AI agents call zero_estimate_cost to retrieve information from Zero Network MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only estimation or lookup of costs based on input parameters. It returns informational data (estimated costs) without creating, modifying, deleting, or committing any financial transactions. While it relates to financial systems, it does not move money or create obligations—it merely calculates and returns estimates.
From the tool's definition Tool name 'zero_estimate_cost' and description 'Estimate the cost of operating on Zero Network' indicate a query/calculation operation that retrieves cost information without modifying state or executing transactions.
Attacks that exploit this kind of access
Estimate the cost of operating on Zero Network. It is categorised as a Read tool in the Zero Network MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Zero Network MCP Server MCP server in PolicyLayer and add a rule for zero_estimate_cost: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Zero Network MCP Server. Nothing to install.
zero_estimate_cost is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the zero_estimate_cost rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for zero_estimate_cost. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
zero_estimate_cost is provided by the Zero Network MCP Server MCP server (zzero-net/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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